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Ferrovanadium alloy smelting furnace lining and preparation method thereof

A ferro-vanadium alloy and smelting furnace technology, which is applied to furnaces, furnace components, lining repairs, etc., can solve problems such as high magnesium oxide content, low smelting yield, and environmental protection, and achieve strong adhesion, improve smelting yield, The effect of reducing the content

Active Publication Date: 2021-08-03
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the existing problems in the prior art, such as poor effect and non-environmental protection caused by the use of magnesium chloride binder in the furnace lining preparation process, as well as problems such as too high magnesium oxide content in the smelting slag and low smelting yield, and to provide a Ferro-vanadium alloy smelting furnace lining and preparation method thereof

Method used

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preparation example Construction

[0027] One aspect of the present invention provides a method for preparing the lining of a vanadium-ferroalloy smelting furnace, the method comprising the following steps:

[0028] (1) mixing the inorganic binder and the organic binder to obtain a composite binder;

[0029] (2) mixing the composite binder obtained in step (1) with magnesia, then adding water and stirring to obtain a wet-beating material;

[0030] (3) Pour the wet-beating material into the mould, tie it into a knot, remove the mould, spray a liquid binder on the surface in contact with the mould, then dry it, and then perform oxygen-enriched baking to obtain a vanadium-ferroalloy smelting furnace Furnace lining;

[0031] Wherein, in step (1), the total weight of the inorganic binder and the organic binder is 100%, the amount of the inorganic binder is 70-90% by weight, and the organic binder The consumption is 10-30% by weight;

[0032] In step (2), the amount of the composite binder is 2-20% by weight of th...

Embodiment 1

[0052] (1) Mixing the inorganic binder (alumina hydrate) and the organic binder (carboxymethyl cellulose) to obtain a composite binder; wherein, the total amount of the inorganic binder and the organic binder is The weight is 100%, the amount of the inorganic binder is 90% by weight, and the amount of the organic binder is 10% by weight;

[0053] (2) the composite binder that step (1) obtains and metallurgical grade magnesia (the magnesia contains 50% by weight of fine-grained magnesia, 30% by weight of medium-sized magnesia and 20% by weight of coarse magnesia) The particle size of the fine-grained magnesia is less than 0.074mm, the particle size of the medium-sized magnesia is 0.074mm-1.18mm, and the particle size of the coarse-grained magnesia is diameter of 1.40mm to 2.36mm) and mix, control the weight of the composite binder to account for 11% of the weight of the magnesia, then add water and stir to obtain a wet-beating material with a water content of 6% by weight;

[...

Embodiment 2

[0056] (1) Inorganic binder (the inorganic binder contains the colloidal alumina of 50% of the converter, the magnesium citrate of 25% of the converter and the magnesium stearate of 25% of the converter) and the organic binder (pregelatinized Starch) is mixed to obtain a composite binder; wherein, the total weight of the inorganic binder and the organic binder is 100%, and the amount of the inorganic binder is 90% by weight, and the organic binder is The consumption of binder is 10% by weight;

[0057] (2) the composite binder that step (1) obtains and fused magnesia (the magnesia contains 60% by weight of fine-grained magnesia, 20% by weight of medium-sized magnesia and 20% by weight of coarse The particle size of the fine-grained magnesia is less than 0.074mm, the particle size of the medium-sized magnesia is 0.074mm-1.18mm, and the particle size of the coarse-grained magnesia is diameter of 1.40 mm to 2.36 mm) and mixed, the weight of the composite binder is controlled to ...

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Abstract

The invention relates to the technical field of vanadium iron furnace knotting, and discloses a ferrovanadium alloy smelting furnace lining and a preparation method thereof. The method comprises the following steps: (1) mixing an inorganic binder and an organic binder to obtain a composite binder; (2) mixing the composite binder obtained in the step (1) with magnesia, and then adding water and conducting stirring to obtain a wet-ramming material; and (3) injecting the wet-ramming material into a mould for knotting and forming, then removing the mould, spraying a liquid binder to the surface making contact with the mould, then conducting air drying, and then conducting oxygen-enriched baking, so as to obtain the ferrovanadium alloy smelting furnace lining. According to the method, a novel environment-friendly chlorine-free composite binder is used and has the advantages of being high in adhesion capacity, safe, environmentally friendly and efficient, hydrogen chloride-containing gas and acid mist cannot be generated in the baking process, the furnace lining is firmer and more compact after being subjected to wet knotting and baking, the preparation link of on-site high-temperature boiling of brine containing magnesium chloride is eliminated, the smelting yield is increased, and the content of magnesium oxide in the smelting slag is reduced.

Description

technical field [0001] The invention relates to the technical field of vanadium-iron furnace knotting, in particular to a lining of a vanadium-iron alloy smelting furnace and a preparation method thereof. Background technique [0002] The reduction product of ferrovanadium alloy in the smelting process is aluminum oxide. In order to reduce the melting point and viscosity of the slag system and fully recover the vanadium element in the slag, a large amount of calcium oxide is added in the middle of the smelting process to make slag. When the strength of the magnesia lining material is not enough, the erosion and consumption at high temperature will lead to a higher content of magnesium oxide in the slag, and it will also cause a large amount of vanadium oxide and vanadium alloy to penetrate into the refractory material. Therefore, improving the furnace lining material is also one of the key points to increase the yield of vanadium smelting. [0003] Patent application 201610...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/043F27D1/16
CPCC04B35/043F27D1/1626C04B2235/3217C04B2235/449C04B2235/6583C04B2235/77C04B2235/96
Inventor 叶明峰黄云余彬景涵
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP